feat: add Stop-DeviceApp command

[JoshuaMoelans]

As part of https://github.com/getsentry/sentry-switch/pull/165 where we noticed that Integration Test on Switch Ounce are failing, because the events stay Pending.

This is a more robust follow-up of what we introduced in https://github.com/getsentry/sentry-switch/pull/144 , where we invoked terminate for the unreal demo. Will follow up from this PR in the 165 revert³ one on sentry-switch.

[sentry]

Bug: The Assert-DeviceSession health check may throw an exception on a crashed device, preventing the StopApplication() command from running and defeating the script's purpose.
_{Severity: HIGH}

Suggested Fix

Either modify Stop-DeviceApp to skip or handle the exception from the Assert-DeviceSession check, or change Assert-DeviceSession to use a more robust health check that will not fail in post-crash scenarios.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: app-runner/Public/Stop-DeviceApp.ps1#L22

Potential issue: The `Stop-DeviceApp` script is intended to function after an
application crash. However, it calls `Assert-DeviceSession` on line 22, which performs a
health check by running a `getstatus` command. If a device becomes unresponsive to
`getstatus` after a crash—the exact scenario the script is designed for—the health check
will throw an exception. This exception prevents the script from ever reaching the
`$provider.StopApplication()` call on line 27, defeating the purpose of the new
functionality.

_{Did we get this right? 👍 / 👎 to inform future reviews.}